You know if he likes you because he would give you hints that he likes you in the hallway or after/before school, or he would ask you out.
He will like your statuses on facebook.
The only way your going to know if this guy likes you is ask him.
If it before school or class.
Ask him it's not like you see him everyday so it won't be awkward if he says no
It is ok to like a guy after you know he likes you. That is perfectly normal and a part of life.
If a guy likes you but you don't know him he may look at you or walk by you whenever possible.
He likes you
If he says i like you
Not sure how you expect someone to magically know something.
No it means he's nosy and wants to know who it is!
This is a tongue twister. And no.
I know a boy in my class likes me,but I just ignore him.He hits me and he actually shows he is flirting!